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A customer service department and is customers to sate their own the phone service on a scale of 1-20 immediately after their
c. What conclusions about customer average rating and minutes on hold can be drawn from these results? One can be 95% confide
Minutes Rating 14 4. 9 14 0 19 4 10 6 14 2 16 9 15 3 20 7 15 3 14
math   Statistics-And-Probability   
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Answer #1

using excel>data>data analysis>Regression

we have

SUMMARY OUTPUT
Regression Statistics
Multiple R 0.39411
R Square 0.155322
Adjusted R Square 0.049738
Standard Error 2.736047
Observations 10
ANOVA
df SS MS F Significance F
Regression 1 11.01236 11.01236 1.471069 0.259773
Residual 8 59.88764 7.485955
Total 9 70.9
Coefficients Standard Error t Stat P-value Lower 95% Upper 95%
Intercept 16.8427 1.677222 10.04202 8.23E-06 12.97502 20.71038
Minutes -0.37079 0.305708 -1.21288 0.259773 -1.07575 0.334178

a ) option C is true

t = -1.21

p value = 0.260

since p value is greater than 0.05, the regression slope is not significant .

b ) LCL =-1.08

UCL = 0.334

please provide droplets for part c in comment box

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